— 267 — 



Cytema (tela, contextus cellulosus) e cellulis hi coa- 



dunatis composilum, laxum v. striotum, species offcrt seqnentcs: 



\. Cytemn laxum: a) Merenchyjna^ e cellulis similaribus 

 V. magniludine diversis, sphaeric. v. ovalibus, laxius agpre- 

 gatis compositum. b) Hormcnchyma s. mcrencbyma monila- 

 re Algar., in catenulas saepius dicholomas coordinatum. c) 

 Aslrenchyma (tela spongiosa), e cellulis slellatis cum iiilersti- 

 tiis magnis constans. dj Plocenchyma (tela contexfa) e fdis 

 solidis V. tubulosis, rarefactis v. densis, simpl., ramosis, ana- 

 stomosantib. v. varie imphcatis constans, thalhim totum v. 

 certas partes ejus consliluens — in Fungis, Algis, Spongiis 

 et Lichcnib. praecipue. 



2. Cytema slriclum: a) Parenchyma., e celhihs tcneri- 

 oribus, arctius conjunctis, ssepius angulosis, minorib., majo- 

 rib. V. variis (micro- macro- v. heterocytum) compositum. 

 Distingdimus c. Kiitzingio Epenchyma., cujus celliihe in- 

 chidunt cnlocystkJes (Amyhclzcllen, utricuh primordiales H. 

 Mohlj, et PercTfchyma^ e cellulis minoribus, gonidia in nu- 

 cleum compacta includentibus (Kcrnzdlen). — b) Prosen- 

 chyma (tela lignosa et Pleurenchyma Meyen), e cellulis e- 

 longalis, crassis (et porosis) arcle conncxis, cavilate minima 

 gaudenlib. coalescens, duriliim ligni variam det^rminat pro 

 ritione parietum, luminis et cohaesionis cellularum. — c) 

 Inenchyma (tcla fdirosa et liber) e ccllulis longis crassis, 

 mollib., concatcnalis et compaclis constans. 



In thallo heterocvlo, pr?esertim lercti, chstinguimus, prae- 

 ler amphidermidem gcdineamj EpithaJHum et Enclothallium 

 (cortex et medulla); his saepe intercedit MesothalUum simplex 

 V. multiplex — polyslromaticum. — Epilhallium Algarum plu- 

 rium e perenchymate v. hormenchym;ite, — mesothalhum e 

 parenchymate v. epenchymate, — endothallium vero e par- 

 enchymate vacuo v. plokenchymate cffinguntur. Cellulae ergo 

 perenchymaticae primigenae et ovuhs subsimiles demum in 

 parenchyma Ihahi varium v. in ovula perfecta transformantur. 



